Automatic door closure for double-acting doors

Details Automatic door closure for double-acting doors Automatic door closure for double-acting doors

2006-01-31

2006-01-31

Strimbu, Gregory J. (Department: 3634)

Movable or removable closures

Mounted for multidirectional or oblique movement

One direction imparts gravitational bias to swinging...

C049S237000, C016S316000

Reexamination Certificate

active

06990772

ABSTRACT:
A double-acting door closure device that automatically returns a double-acting door to a preferred center position comprises first and second members each having a helical end surface extending transversely of its center axis. The first member is secured in spaced relation to a door jamb and the second member is mounted on and secured to a door post that extends through and is rotatable in the first member, with the helical end surface of the second member facing and engaging the helical end surface of the first member. The helical end surfaces coact with one another to gravitationally return a door attached to the door post to a closed position automatically after the door has been pushed opened and then released.

REFERENCES:
patent: 424088 (1890-03-01), Booraem
patent: 454343 (1891-06-01), Gibson
patent: 1845477 (1932-02-01), Bommer
patent: 2840848 (1958-07-01), Hickey
patent: 3107758 (1963-10-01), Benham
patent: 3113649 (1963-12-01), Wargo
patent: 3134134 (1964-05-01), Keator
patent: 3147831 (1964-09-01), Tansey
patent: 3263365 (1966-08-01), Eckel
patent: 3384996 (1968-05-01), Gilchrist et al.
patent: 3545032 (1970-12-01), Dielman
patent: 3546736 (1970-12-01), Booth
patent: 4078334 (1978-03-01), Lambias
patent: 4124955 (1978-11-01), Kochis
patent: 4292764 (1981-10-01), Kochis
patent: 4570384 (1986-02-01), Eckel
patent: 4881353 (1989-11-01), Braendel et al.
patent: 4951351 (1990-08-01), Eckel

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